Teacher: Walter, why don't you wash your face? I can see what you had for breakfast this morning.

Walter: What was it?

Teacher: Eggs.

Walter: Wrong. That was yesterday.

实质性的纠正

老　师：沃尔特，你为什么不洗脸?我看得出你今天早饭吃了什么。

沃尔特：我吃了什么？

老　师：鸡蛋。

沃尔特：错了，老师。那是昨天吃的。